net/ixgbe/base: fix getting PHY type for some x550 devices
net/ixgbe/base: fix getting PHY type for some x550 devices

Return correct physical layer for some x550 devices.

Fixes: 76d5b807ff74 ("ixgbe/base: new X557 phy")
Fixes: d2e72774e58c ("ixgbe/base: support X550")

Signed-off-by: Wei Dai <17e09bedab62904a2ae618ef4468b0b1372334a2@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk